I would stick with GT and I'll tell you why, GT had a huge selection of songs to learn. Learning songs once you finish fundamentals 1 is the best thing you can do to practice and hone your skills. Learn songs that are at your level or slightly above, in the area you are interested in (rock, blues,country,etc), which you will find most are very similar in that they often share the same key, use familiar chords, barre chords,power chords. Learn a song until you can play it without having to think about what chord to play next, own it. Then learn another, and go back and play what you have learned or own so that you don't forget it. Your skills will grow with each song you learn, and that is how you learn to play guitar. Along the way if you want to pick up theory, or scales fine GT has this and more but learning songs is the reason you picked up the guitar in the first place.